Foam sheet, method and apparatus for widening foam sheet

Details Foam sheet, method and apparatus for widening foam sheet Foam sheet, method and apparatus for widening foam sheet

1995-07-05

1997-08-19

McCamish, Marion E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

264 461, 2642101, 2642884, 2642888, 264291, B29C 5500

Patent

active

056585217

ABSTRACT:
An apparatus 1 for widening a foam sheet S obtained immediately after heating and foaming a foam sheet which has not been yet widened, while the foam sheet S is continuously received or supplied. The sheet widening apparatus 1 comprises: a pair of chains 2 constructed in the form of endless chains composed of links 22 having pin parts 21 and a driving device 3 meshing with these chains 2 and driving the chains 2 along such loci as to widen the space between the chains 2 from sheet receiving start points to sheet receving end points. A method for widening a foam sheet by the sheet widening apparatus 1 comprises the steps of piercing both the side parts of the foam sheet S with the pins 21 at the sheet receiving start points; widening the space of width between the pins 21 along gently curved loci by drying the chains 2 while the pins 21 penetrating the foam sheet; and receiving the foam sheet S from the sheet receiving start points to the sheet receiving end points while the foam sheet is widened. The foam sheet S obtained after the widening step in accordance with the sheet widening method.

REFERENCES:
patent: 3106761 (1963-10-01), Mohring et al.
patent: 3923293 (1975-12-01), Wiegrand
patent: 5087185 (1992-02-01), Yada et al.

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